<template>
    <div class="login-container">
        <el-row>
            <el-col :xs="24" :sm="24" :md="12" :lg="16" :xl="16">
                <div style="color: transparent">占位符</div>
            </el-col>
            <el-col :xs="24" :sm="24" :md="12" :lg="8" :xl="8">
                <el-form ref="form" :model="form" :rules="rules" class="login-form" label-position="left">
                    <div class="title">hello !</div>
                    <div class="title-tips">欢迎来到{{ title }}！</div>
                    <el-form-item style="margin-top: 40px" prop="username">
                        <span class="svg-container svg-container-admin">
                            <el-icon :size="20"><User /></el-icon>
                        </span>
                        <el-input v-model.trim="form.username" v-focus placeholder="请输入用户名" tabindex="1" type="text"/>
                    </el-form-item>
                    <el-form-item prop="password">
                        <span class="svg-container">
                             <el-icon :size="20"><Lock /></el-icon>
                        </span>
                        <el-input :key="passwordType" ref="password" v-model.trim="form.password" :type="passwordType" tabindex="2" placeholder="请输入密码" @keyup.enter.native="handleLogin"/>
                        <span v-if="passwordType === 'password'" class="show-password" @click="handlePassword">
                            <el-icon :size="20"><Hide /></el-icon>
                        </span>
                        <span v-else class="show-password" @click="handlePassword">
                          <el-icon :size="20"><View /></el-icon>
                        </span>
                    </el-form-item>
                    <el-button :loading="loading" class="login-btn" type="primary" @click="handleLogin">登录</el-button>
                </el-form>
            </el-col>
        </el-row>
    </div>
</template>

<script>
import {isPassword} from '../utils/validate'

export default {
    name: 'Login',
    directives: {
        focus: {
            inserted(el) {
                el.querySelector('input').focus()
            },
        },
    },
    data() {
        const validateusername = (rule, value, callback) => {
            if ('' == value) {
                callback(new Error('用户名不能为空'))
            } else {
                callback()
            }
        }
        const validatePassword = (rule, value, callback) => {
            if (!isPassword(value)) {
                callback(new Error('密码不能少于6位'))
            } else {
                callback()
            }
        }
        return {
            title: "管理端",
            form: {
                username: '',
                password: '',
            },
            rules: {
                username: [
                    {
                        required: true,
                        trigger: 'blur',
                        validator: validateusername,
                    },
                ],
                password: [
                    {
                        required: true,
                        trigger: 'blur',
                        validator: validatePassword,
                    },
                ],
            },
            loading: false,
            passwordType: 'password',
            redirect: undefined,
        }
    },
    watch: {
        $route: {
            handler(route) {
                this.redirect = (route.query && route.query.redirect) || '/'
            },
            immediate: true,
        },
    },
    created() {
        document.body.style.overflow = 'hidden'
    },
    beforeDestroy() {
        document.body.style.overflow = 'auto'
    },
    mounted() {

    },
    methods: {
        handlePassword() {
            this.passwordType === 'password'
                ? (this.passwordType = '')
                : (this.passwordType = 'password')
            this.$nextTick(() => {
                this.$refs.password.focus()
            })
        },
        handleLogin() {
            this.$refs.form.validate((valid) => {
                if (valid) {
                    this.loading = true
                    this.$router.push('/index').catch(() => {})
                    this.loading = false
                } else {
                    return false
                }
            })
        },
    },
}
</script>

<style lang="scss" scoped>
.login-container {
    height: 100vh;
    background: url('/storage/images/login_images/background.jpg') center center fixed no-repeat;
    background-size: cover;

    .title {
        font-size: 54px;
        font-weight: 500;
        color: rgba(14, 18, 26, 1);
    }

    .title-tips {
        margin-top: 29px;
        font-size: 20px;
        font-weight: 400;
        color: rgba(14, 18, 26, 1);
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .login-btn {
        display: inherit;
        width: 220px;
        height: 60px;
        margin-top: 5px;
        border: 0;

        &:hover {
            opacity: 0.9;
        }
    }

    .login-form {
        position: relative;
        max-width: 100%;
        margin: calc((100vh - 425px) / 2) 10% 10%;
        overflow: hidden;

        .forget-password {
            width: 100%;
            margin-top: 40px;
            text-align: left;

            .forget-pass {
                width: 129px;
                height: 19px;
                font-size: 20px;
                font-weight: 400;
                color: rgba(92, 102, 240, 1);
            }
        }
    }

    .tips {
        margin-bottom: 10px;
        font-size: 12px;
        color: white;

        span {
            &:first-of-type {
                margin-right: 16px;
            }
        }
    }

    .title-container {
        position: relative;

        .title {
            margin: 0 auto 40px auto;
            font-size: 34px;
            font-weight: bold;
            color: blue;
            text-align: center;
        }
    }

    .svg-container {
        position: absolute;
        top: 22px;
        left: 15px;
        z-index: 99999;
        font-size: 16px;
        color: #d7dee3;
        cursor: pointer;
        user-select: none;
    }

    .show-password {
        position: absolute;
        top: 22px;
        right: 25px;
        font-size: 16px;
        color: #d7dee3;
        cursor: pointer;
        user-select: none;
    }

    ::v-deep {
        .el-form-item {
            padding-right: 0;
            margin: 30px 0;
            color: #454545;
            background: transparent;
            border: 1px solid transparent;
            border-radius: 2px;

            &__content {
                //min-height: $base-input-height;
                //line-height: $base-input-height;
                min-height: 2em;
                line-height: 2em;
            }

            &__error {
                position: absolute;
                top: 100%;
                left: 18px;
                font-size: 12px;
                line-height: 18px;
                color: red;
            }
        }

        .el-input {
            box-sizing: border-box;

            input {
                height: 58px;
                padding-top: 2px;
                padding-left: 45px;
                font-size: 12px;
                line-height: 90px;
                //color: $base-font-color;
                //background: #f6f4fc;
                border: 0;
                caret-color: black;
            }
        }
    }
}
</style>
